Mr. A. Bell on the Crag-Fauna. 351 radial origin for the flexor sublimis, and of a specialized flexor pollicis longus ; but the presence of a third thumb-extensor and the limitation of the extensor minimi digiti to the fifth finger are tendencies towards the anthropoid disposition of parts. The small and variable psoas parvus, the absent pyrami-dalis, are interesting in consideration of the variability of these parts in man, 5. In the lower limb the most decidedly pithecoid features are the small size of the gluteus maximus and its elongated insertion, the position of the semimembra-nosus, the absence of a tibial head of the solajus and of the peronseus tertius, and the doubling of the tibialis anticus. XLV. — Gontrihitions to the Crag-Fauna. Part IL* By Alfeed Bell. Close research in some new sections and excavations that have been made in the. Suffblk-Crag district during the past autumn and winter has produced some very interesting results. Upwards of fifty species of shells (some being undescribed) new to our English Crags, and more than thirty species of others which occur at different horizons to those known pre-viously, have amply rewarded the efforts of my brothers and self, the Red-Crag Polyzoa being also increased from fifteen to thirty species. Species marked thus * signify the new additions ; the others are simply new to the horizon to which they are re-ferred. C. C, R. C, Norw. C, and Chil. scr. are used as contrac-tions for the Coralline, Red, and Norwich Crags, and the Chillesford series. Mammalia. ^Balcena emarginata^ Ow. The only previously recorded cetotolite from the C. C. (now in the Museum of Practical Geology) was obtained by Col. Alexander, many years since, and is of another species, probably B. gihhosa^ Ow. C. C. Orford. Second examples of Castor veterior^ Lamk. (an incisor), and Ziphius mediiUneatiis^ Ow., have been lately obtained by myself in the Red Crag, Pisces. No list of Crag fishes having been published (probab^ owing to the difiiculty of identifying the fragmentary portions of the skeleton met with), I offer the following short one, * For Part I. see Ann. & INIag. Nat. Hist. Sept. 1870. 9r,*
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